Page 71 - The Illustrated Dictionary of Electronics

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B1. Symbol for SUSCEPTANCE. 2. Symbol for “walkie-talkie.” It is battery-powered and can be
FLUX DENSITY. 3. Abbreviation of BATTERY. 4. carried around. It has an inductively loaded, short
Symbol for BORON. 5. Symbol for base of tran- “rubber duckie” antenna similar to the antennas
sistor (see BASE, 1). 6. Abbreviation of BASS. 7. on cordless telephone sets. The receiver can pick
Abbreviation of BEL. 8. Anode voltage or main op- up signals from the transmitter at distances of up
erating voltage in any circuit (when used with to about 200 feet. The radio-frequency signals
sign). Also see B VOLTAGE. pass easily through walls, ceilings, and floors.
b1. Symbol for SUSCEPTANCE. 2. Symbol for back bias 1. A feedback signal (negative or posi-
base of transistor (see BASE, 1). 3. Abbreviation tive). 2. Reverse bias (also see BIAS). 3. A reverse
of BASS. 4. Symbol for BARN. bias voltage, obtained from a voltage divider con-
B&S See AMERICAN WIRE GAUGE. nected between a voltage source and ground.
B5-cut crystal A piezoelectric plate cut from a
quartz crystal in such a way that the face of the
plate is at an angle, with respect to the z-axis of B+
the crystal. This type of crystal has good fre-
quency stability under conditions of changing
temperature.
BA Abbreviation of BATTERY. Also see B and BAT. B−
Ba Symbol for BARIUM.
babbit A relatively soft, tin-base alloy of various
compositions. One composition contains 7.4%
antimony, 3.7% copper, and 88.9% tin. R1
babble Interference caused by crosstalk from a Out
number of channels.
babble signal A jamming signal containing babble
components. See BABBLE and JAMMING.
BABS Abbreviation of BLIND-APPROACH BEACON
SYSTEM. In
baby monitor A short-range radio transmitter and R2
receiver that can be used to listen at a distance to
the sounds in an infant’s room. The transmitter R1, R2
contains a sensitive microphone, a whip antenna, provide
and a power supply. The unit can be placed on a bias
table or desk, or even on the floor near the baby’s
crib. The receiver is similar to a handheld back bias, 3

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